[PATCH 5/7] nvme: also expose the namespace identification sysfs files for mpath nodes

[Martin K. Petersen]

Christoph,

> We do this by adding a helper that returns the ns_head for a device
> that can belong to either the per-controller or per-subsystem block
> device nodes, and otherwise reuse all the existing code.

Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>

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Martin K. Petersen	Oracle Linux Engineering